Table 2

Atonic postpartum hemorrhage by region and hospital volume, British Columbia, 2000-2009
Region (by health authority of mother's residence) All years Rate per 100 deliveries by year 2009 vs. 2000 P for trend2
n1 rate 2000 2001 2008 2009 RR 95% CI
Fraser 8340 5.2 5.0 4.9 6.6 6.0 1.19 1.09-1.30 <0.001
Interior 2769 4.7 3.9 3.4 5.8 7.0 1.81 1.54-2.11 <0.001
Northern 1694 4.9 5.2 4.8 5.6 4.1 0.79 0.64-0.97 0.03
Vancouver Coastal 6995 7.1 5.4 6.0 8.8 8.3 1.55 1.39-1.72 <0.001
Vancouver Island 2206 3.7 3.8 3.8 4.4 4.9 1.29 1.09-1.53 <0.001
Hospital Volume (by deliveries per year)
<500 2537 4.5 5.0 4.1 5.6 5.2 1.04 0.88-1.2 <0.001
500-999 2363 4.6 3.8 4.0 5.6 5.6 1.49 1.27-1.75 <0.001
1000-1499 3369 4.2 5.6 4.4 5.3 4.0 0.71 0.61-0.84 0.88
1500-2499 3851 6.3 1.5 4.9 8.4 8.2 5.45 4.30-6.92 <0.001
≥2500 9980 6.1 5.6 5.5 6.8 6.5 1.15 1.05-1.25 <0.001

1n refers to number of cases of atonic postpartum hemorrhage.

2P value based on data for all years between 2000 and 2009.

RR denotes rate ratio and 95% CI denotes 95% confidence intervals.

Mehrabadi et al.

Mehrabadi et al. BMC Pregnancy and Childbirth 2012 12:108   doi:10.1186/1471-2393-12-108

Open Data